I've grabbed the 720p flvs using Firebug's net monitor and then am using Media Player Classic to step by frame. Not sure whether they are clearer than mp4 or not - probably the same. It seems some of the answers were only just made visible on the 1080p master though - would be nice if they could upload that version, or a higher bitrate, or to Vimeo, or give us all free CSI "enhance" software, or...